March 16, 2022 8:39 am Pfizer Requests FDA Authorization for 2nd Booster in Seniors Pfizer asked the FDA Tuesday to authorize a second booster dose of its COVID-19 vaccine for Americans ages 65 and over. US & World Videos 2:19 San Francisco barbershop struggles to stay open after pandemic 0:51 Alameda County using dogs to detect COVID 3:57 Interview: Doctor's perspective on COVID 4 years after shutdown started 2:27 Marking 4 years since COVID-19 shut down the Bay Area 2:09 CDC updates COVID isolation guidelines
